US4695098A - Excavator, particularly for continuous strip mining of minerals - Google Patents

Excavator, particularly for continuous strip mining of minerals Download PDF

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Publication number
US4695098A
US4695098A US06/864,439 US86443986A US4695098A US 4695098 A US4695098 A US 4695098A US 86443986 A US86443986 A US 86443986A US 4695098 A US4695098 A US 4695098A
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US
United States
Prior art keywords
delivery
digging
breaking
roller
wedge
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US06/864,439
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English (en)
Inventor
Friedrich W. Paurat
Roland Paurat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PAURAT A LIMITED-LIABILITY Co OF FED REP OF GERMANY GmbH
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Individual
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Assigned to PAURAT GMBH, A LIMITED-LIABILITY COMPANY OF FED. REP. OF GERMANY reassignment PAURAT GMBH, A LIMITED-LIABILITY COMPANY OF FED. REP. OF GERMANY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PAURAT, FRIEDRICH W., PAURAT, ROLAND
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C27/00—Machines which completely free the mineral from the seam
    • E21C27/20—Mineral freed by means not involving slitting
    • E21C27/24—Mineral freed by means not involving slitting by milling means acting on the full working face, i.e. the rotary axis of the tool carrier being substantially parallel to the working face
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
    • E21D9/124—Helical conveying means therefor

Definitions

  • Our invention relates to an excavating machine for use in mining operations and, more particularly, to an excavator for the continuous strip mining of minerals.
  • An excavator used for mining minerals can comprise a track drive, a digging unit with at least one digging roller and a connected conveyor for the raw ore or broken mineral matter formed in the mining operation.
  • the digging roller has a roller core and at least one helical digging and delivery member or screw or worm flight.
  • a delivery mechanism which receives raw ore from the helical digging flight is mounted between the conveyor and the digging roller.
  • the digging unit can be movable up and down and can also be pivotable about a vertical axis.
  • two digging rollers are provided which work opposing the delivery mechanism.
  • additional digging rollers angled fordwardly can work with the above mentioned digging rollers.
  • a tunnel or gallery excavator is known. These can be employed only with some difficulty as strip-mining machines.
  • the delivery mechanism comprises a loading apron and digging tool in the form of a digging arm or digging roller.
  • the digging tool also guides the raw ore to the conveyor.
  • Such machines cannot guarantee that the delivered raw ore component will not have a grain size which is too large and exceeds a predetermined minimum grain size. Such oversize pieces lead to an interference or disturbance in the flow of the raw ore, in its manipulation and frequently with its delivery.
  • an excavator for mining minerals comprising a track drive, a digging unit with at least one digging roller and a connected conveyor for the raw ore formed in the mining operation.
  • the digging roller has a roller core and at least one helical digging and delivery member or flight.
  • a delivery mechanism which receives raw ore from the helical digging and delivery flight is positioned between the conveyor and the digging roller.
  • the delivery mechanism comprises a breaking wedge and a vertically dispsosed delivery frame with an advantageously rectangular delivery opening connected to the breaking wedge.
  • the breaking wedge extends from the underside, i.e. the horizontal lower member, of the delivery frame to the ground, and with a breaking surface thereon substantially tangent to the helical digging and delivery flight.
  • the conveyor is mounted on the underside of the delivery frame.
  • the helical digging and delivery flight is a helical breaking tool and has a thread pitch or interturn spacing G which is smaller than the width B and the height C of the delivery opening.
  • the digging roller is rotatable in the working direction at the breaking wedge from below to above.
  • Our invention is based on our discovery that the helical digging and delivery flight together with the roller core can work as a stone breaker or crusher when the suitable complementary device is provided.
  • This device can be a very simple tool, namely the breaking wedge described above.
  • This store crusher is designed with parameters A, H and G so that a maximum grain size is precisely produced, namely that given by the relationship (A+H) ⁇ G.
  • This definite functional relationship is guranteed, because the digging roller during the digging work as it were "undershoots", namely moves from below to above.
  • the maximum grain size according to our invention is smaller than the height and width of the delivery opening so those components of the raw ore which are less than or equal to that grain size are conveyed with high efficiency and of course pieces whose size is larger than that grain size do not reach the conveyor. Components of the raw ore which are thrown against the delivery frame fall down to be broken into smaller pieces.
  • the delivery frame with the breaking wedge can be movable in a vertical direction and/or the gap A between the delivery frame and said cutting roller can be adjusted.
  • connection of the conveyor to the delivery mechanism can be made in a variety of ways.
  • the conveyor is a belt conveyor and has a guide roller near the under side of the delivery mechanism.
  • the helical digging and delivery flight can be provided with auxiliary breaking tools particularly with picks.
  • FIG. 1 is a top plan view of an excavator for mining minerals according to our invention
  • FIG. 2 is a cutaway top plan view to an enlarged scale of the front of the excavator of FIG. 1 showing a digging unit, a delivery mechanism and conveyor;
  • FIG. 3 is a cross sectional view through the apparatus of FIG. 2 taken along the section line III-III.
  • the apparatus shown in the drawing is an excavator for mining minerals, particularly for strip mining minerals. It comprises basically a track drive 1, a digging unit 2 with a plurality of digging rollers 3 and a connected conveyor 4 for the raw ore.
  • the digging rollers 3 have a roller core 5 and at least one helical digging and delivery flight 6.
  • a delivery mechanism 7 and 8 is mounted between the digging rollers 3 and the conveyor 4.
  • the structure of the excavator is such that the helical digging and delivery flight 6 feeds the raw ore to the conveyor 4 and of course in the direction of the curved arrow 20 shown in FIG. 2.
  • FIGS. 2 and 3 show that the delivery mechanism 7 and 8, which extends over the entire width of both central digging rollers 3, comprises a breaking wedge 7 and connected with it a delivery frame 8 with a delivery opening 9.
  • the breaking wedge 7 extends, as seen form FIG. 3, from the underside of the delivery frame 8 to the ground 10 and of course with its breaking surface 11 substantially tangent to the helical digging and delivery flight 6.
  • the breaking wedge 7 is spaced with a gap A from the helical digging and delivery flight 6, which has a helical height H.
  • the sum of the gap width A and the helical height H is smaller than the width B and the height C of the corresponding delivery opening 9.
  • the helical digging and delivery flight 6 is also a ground breaking or excavating tool. It has a thread pitch G which is smaller than the width B and the height C of the rectangular delivery opening 9.
  • the digging rollers 3 are rotated according to the shown curved arrows 12, that is, at the breaking wedge 7 from below to above by a hydraulic motor in the rollers 3.
  • maximum grain size is equal to (A+H) ⁇ G.
  • the delivery frame 8 can be adjusted by moving it with its breaking wedge 7 in a vertical direction and/or by varying the gap A with the digging roller 3. This latter adjustment can be performed by a suitable piston-cylinder arrangement 13 shown with dashed lines in FIG. 2 and mounted on the supporting members 14.
  • the delivery opening 9 is rectangular in this example.
  • the conveyor 4 is a belt conveyor with a guide roller 15 positioned near the underside of the delivery frame 8.
  • the helical digging and delivery flight 6 can have auxiliary breaking tools mounted on it, particularly picks 22.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
US06/864,439 1985-05-24 1986-05-16 Excavator, particularly for continuous strip mining of minerals Expired - Fee Related US4695098A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3518691 1985-05-24
DE3518691A DE3518691C1 (de) 1985-05-24 1985-05-24 Gewinnungsmaschine fuer mineralische Rohstoffe

Publications (1)

Publication Number Publication Date
US4695098A true US4695098A (en) 1987-09-22

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US06/864,439 Expired - Fee Related US4695098A (en) 1985-05-24 1986-05-16 Excavator, particularly for continuous strip mining of minerals

Country Status (4)

Country Link
US (1) US4695098A (de)
AU (1) AU572729B2 (de)
DE (1) DE3518691C1 (de)
GB (1) GB2175940B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3739680A1 (de) * 1987-11-24 1989-06-15 Hausherr & Soehne Rudolf Maschine und verfahren zum kontinuierlichen loesen von gestein od. dgl. und abfoerdern des geloesten, zerkleinerten haufwerks im berg-, erd- und tunnelbau
US4871213A (en) * 1987-01-16 1989-10-03 R. A. Hanson Company, Inc. Excavating apparatus with adjustable breaker bar
US20040111960A1 (en) * 2002-12-16 2004-06-17 Smullen Marcia J. Apparatus and method for treating top soil
US20070204489A1 (en) * 2006-03-03 2007-09-06 Corrado Frank L Earthmoving device with materials handling improvements
US20070209241A1 (en) * 2006-03-03 2007-09-13 Corrado American, Inc. Earthmoving device
CN101949291A (zh) * 2009-07-09 2011-01-19 玛珂系统分析和开发有限公司 控制方法
CN104265299A (zh) * 2014-09-05 2015-01-07 韦建国 一种多功能采粉机及其成粉、收集方法
CN107060756A (zh) * 2016-12-30 2017-08-18 中国煤炭科工集团太原研究院有限公司 一种机载回转升降转运装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3621769C1 (de) * 1986-06-28 1988-01-14 Phb Weserhuette Ag Fuer Tagebaugewinnungsgeraete einsetzbare UEbergabeeinrichtung fuer Haufwerk
DE3831161C1 (en) * 1988-09-13 1990-02-01 Reinhard 5461 Windhagen De Wirtgen Cover shield arrangement for surface milling machines
GB2269410A (en) * 1992-08-04 1994-02-09 Michael Bailey Excavation apparatus
DE202006013343U1 (de) * 2006-08-30 2006-12-07 MAN TAKRAF Fördertechnik GmbH Schurre für ein kontinuierlich arbeitendes Tagebaugewinnungsgerät

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735667A (en) * 1956-02-21 Potvin
US3052455A (en) * 1959-01-08 1962-09-04 Saskatchewan Potash Ripper type mining machine
US3892443A (en) * 1973-11-05 1975-07-01 Dresser Ind Continuous cutting and gathering apparatus for a continuous mining machine
US3987564A (en) * 1974-01-21 1976-10-26 Unit Rig & Equipment Co. Outside supports for excavating wheels
US4159055A (en) * 1976-12-29 1979-06-26 Dresser Industries, Inc. Gathering head
US4277105A (en) * 1979-08-07 1981-07-07 Taylor John C Conveyor system for a continuous mining machine
US4441761A (en) * 1982-01-19 1984-04-10 Fields Rush F Mining machine
US4616880A (en) * 1981-12-26 1986-10-14 Kawasaki Jukogyo Kabushiki Kaisha Continuous excavating machine

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2735667A (en) * 1956-02-21 Potvin
US3052455A (en) * 1959-01-08 1962-09-04 Saskatchewan Potash Ripper type mining machine
US3892443A (en) * 1973-11-05 1975-07-01 Dresser Ind Continuous cutting and gathering apparatus for a continuous mining machine
US3987564A (en) * 1974-01-21 1976-10-26 Unit Rig & Equipment Co. Outside supports for excavating wheels
US4159055A (en) * 1976-12-29 1979-06-26 Dresser Industries, Inc. Gathering head
US4277105A (en) * 1979-08-07 1981-07-07 Taylor John C Conveyor system for a continuous mining machine
US4616880A (en) * 1981-12-26 1986-10-14 Kawasaki Jukogyo Kabushiki Kaisha Continuous excavating machine
US4441761A (en) * 1982-01-19 1984-04-10 Fields Rush F Mining machine

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4871213A (en) * 1987-01-16 1989-10-03 R. A. Hanson Company, Inc. Excavating apparatus with adjustable breaker bar
DE3739680A1 (de) * 1987-11-24 1989-06-15 Hausherr & Soehne Rudolf Maschine und verfahren zum kontinuierlichen loesen von gestein od. dgl. und abfoerdern des geloesten, zerkleinerten haufwerks im berg-, erd- und tunnelbau
US20040111960A1 (en) * 2002-12-16 2004-06-17 Smullen Marcia J. Apparatus and method for treating top soil
US6789353B2 (en) 2002-12-16 2004-09-14 Marcia J. Smullen Apparatus and method for treating top soil
US20070204489A1 (en) * 2006-03-03 2007-09-06 Corrado Frank L Earthmoving device with materials handling improvements
US20070209241A1 (en) * 2006-03-03 2007-09-13 Corrado American, Inc. Earthmoving device
CN101949291A (zh) * 2009-07-09 2011-01-19 玛珂系统分析和开发有限公司 控制方法
CN101949291B (zh) * 2009-07-09 2014-06-18 玛珂系统分析和开发有限公司 控制方法
CN104265299A (zh) * 2014-09-05 2015-01-07 韦建国 一种多功能采粉机及其成粉、收集方法
CN107060756A (zh) * 2016-12-30 2017-08-18 中国煤炭科工集团太原研究院有限公司 一种机载回转升降转运装置

Also Published As

Publication number Publication date
GB2175940A (en) 1986-12-10
AU572729B2 (en) 1988-05-12
GB8611315D0 (en) 1986-06-18
DE3518691C1 (de) 1986-10-16
AU5746786A (en) 1986-11-27
GB2175940B (en) 1988-03-09

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Owner name: PAURAT GMBH, A LIMITED-LIABILITY COMPANY OF FED. R

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:PAURAT, FRIEDRICH W.;PAURAT, ROLAND;REEL/FRAME:005036/0487

Effective date: 19890227

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FP Expired due to failure to pay maintenance fee

Effective date: 19910922

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362